Functional Matrix Theory With Special Reference To The Mandible

Growth Theory

Enumerate various theories of growth. Discuss the functional matrix theory with special reference to the mandible.
Or
Enumerate various growth theories. Discuss in detail with diagrams the postnatal growth of the mandible in the context of functional matrix theory.
Answer.

Theories of Growth

“Understanding the role of Functional Matrix Theory in mandibular growth”

• Theories depending on the area where the growth center occur
  • Genetic theory (Brodie)
  • Sutural dominance theory (Sicher)
  • Functional matrix theory (Melvin Moss)
  • Cartilaginous theory (James Scott.
• Theories based on other concepts or hypotheses related to craniofacial growth
  • Von Limborgh’s compromise theory
  • Cybernetic theory (Petrovic)
  • Hunter and Enlow’s growth equivalent concept.

“Importance of studying Functional Matrix Theory for mandibular growth modification”

Read And Learn More: Mandibular Growth, Functional Matrix Theory & Space Maintainers in Orthodontics

Postnatal Growth of Mandible about Functional Matrix Theory

• The growth of the mandible is largely influenced by the functional matrix.
• Growth of the mandible in postnatal life shows the involvement of periosteal and capsular matrices of functional matrix theory.
• The capsular matrix includes the oropharyngeal functional spaces, and the growth of the mandible occurs according to the functional needs of a particular functional system.
• The process of surface remodeling includes the activity of the periosteal matrix.
• Mandible shows the integrity of activity of both periosteal and capsular matrices.
• Mandibular matrix contains:

“Common challenges in applying Functional Matrix Theory to the mandible effectively”

• • Teeth
  • Tongue
  • Neurovascular triads
  • All muscles attached to the mandible
  • Associated salivary glands
  • Fat, skin, and connective tissues
  • Oral and pharyngeal matrix. The mandible is passively positioned, i.e., translated in space via the expansion of oral and pharyngeal spaces.

“Steps to explain Functional Matrix Theory with special reference to the mandible”

• The angle of the mandible, condylar processes, and coronoid processes act as micro-skeletal units. The core of the mandible acts as a macro-skeletal unit.
• The above micro-skeletal units are associated with periosteal matrices, i.e., masseter, temporal,s, and medial pterygoid muscle. The activity of these muscles remodels the micro-skeletal units.
• Growth of the mandible is equal to the sum of translation (change in position), which is carried out by the expansion of the capsular matrix, plus changes in the form, which is carried out by the activity of the f periosteal matrix.